CN218615536U - Forming die of multilayer die cavity structure - Google Patents

Abstract

A forming die of a multilayer die cavity structure comprises an upper die block, a middle die block, a lower die block and a hydraulic oil cylinder; the hydraulic oil cylinder is fixedly arranged on the lower module; the middle module is arranged between the upper module and the lower module through a connecting hydraulic oil cylinder and is pushed out and reset by the hydraulic oil cylinder to control the distance between the middle module and the lower module; a die cavity is arranged between the bottom surface of the upper die block and the top surface of the middle die block; another die cavity is arranged between the bottom surface of the middle die block and the top surface of the lower die block; and hot runners are arranged on the upper module, the middle module and the lower module. Through set up 3 layers of hot runners in mould thickness direction, realize even heating to the product in the die cavity, the centering module passes through hydraulic cylinder control, realizes the smooth compound die and the die sinking of well module and lower module, has improved whole production efficiency.

Description

Forming die of multilayer die cavity structure

Technical Field

The utility model belongs to combined material preparation field especially relates to a forming die of multilayer die cavity structure.

Background

Most of the existing molds with multilayer structures are used in the field of injection molding, and the field of the compression molding molds for prepregs is reported, because the prepregs adopted by compression molding are usually composed of continuous fibers and resin, and the viscosity of the resin in the compression molding process is reduced firstly and then increased rapidly along with the rise of the temperature, the temperature uniformity of the middle, upper and lower surfaces of the corresponding product in the thickness direction is required to be consistent as much as possible by the compression molding mold in the compression molding process for the prepregs, otherwise, the product has internal stress due to the existence of temperature difference, and finally, the product has defects (deformation, surface defects, fiber line disorder and the like); the temperature difference of the product in the thickness direction is increased by using the multi-layer structure die. Ultimately resulting in the current prepreg moulding tools being of substantially single layer construction. When the single-layer structure mold aims at some large thin-wall products (the thickness of the products is less than 1 mm), the single-layer structure mold can only mold one product at a time, the production efficiency is low, and the cost of the molding process is high.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model provides a forming die of multilayer die cavity structure can solve the uneven problem of multilayer die cavity heating, and concrete technical scheme is as follows:

a forming die of a multilayer die cavity structure comprises an upper die block, a middle die block and a lower die block; the upper module comprises an upper module mounting plate, an upper module body and an upper module boss arranged on the bottom surface of the upper module body; the lower module comprises a lower module mounting plate, a lower module body and a lower module concave part arranged on the top surface of the lower module body; the middle module is arranged between the upper module and the lower module through a hydraulic oil cylinder and comprises a middle module body, a middle module concave part on the top surface and a middle module boss on the bottom surface; the middle module concave part and the upper module boss form a die cavity; the middle module boss and the lower module concave part form another die cavity; the hydraulic oil cylinder is arranged on the lower module, and the distance between the middle module and the lower module is controlled by ejecting and resetting the hydraulic oil cylinder; clamping grooves are formed in the upper module mounting plate and the lower module mounting plate, and screws penetrate through the clamping grooves to fix the die on a molding machine forming table; the upper module, the middle module and the lower module are provided with hot runners, the outer runner is externally connected with a mold temperature controller, and the hot runners are used for heating so as to uniformly heat the workpieces in the mold cavity in the thickness direction.

Furthermore, the concave part of the top surface of the middle module and the outer edge of the concave part of the top surface of the lower module are provided with resin glue grooves.

Furthermore, a resin groove is arranged on the concave part of the top surface of the middle module and the concave part of the top surface of the lower module.

Furthermore, the upper module and the lower module are also provided with positioning guide pillars, and the middle module is provided with positioning holes corresponding to the positioning guide pillars, so that the upper module, the middle module and the lower module can be smoothly positioned and assembled.

Furthermore, each die cavity can be divided into an upper layer and a lower layer by arranging a metal plate, so that two products can be molded by one die cavity.

The working principle is as follows: heating an upper module, a middle module and a lower module of a mold to a process temperature, and then laying prepreg in a concave part of the middle module/the lower module according to a laying scheme; after the material spreading is finished, the hydraulic oil cylinder returns to the initial position, the middle module and the lower module are closed, then the upper module, the middle module and the lower module are completely closed by the press, the upper module and the middle module are separated by opening the die by the press after the pressure is maintained for a period of time, then the hydraulic oil cylinder is ejected upwards, the middle module and the lower module are separated, and then the product is taken out from the middle module and the lower module.

Has the advantages that: the utility model relates to a forming die with a multilayer die cavity structure, wherein a middle module is connected by a hydraulic oil cylinder, so that the die assembly and the die opening of the middle module and a lower module can be conveniently realized; aiming at the problem of temperature difference in the thickness direction, the mold is designed in a mode of dividing the mold into 2 mold cavities in the thickness direction by 3 layers of heating (hot runners). When a thin-wall product is molded, the temperature difference in the thickness direction can be less than 2 ℃, and the process requirement of prepreg molding is met; and through the design of a multilayer die cavity, the die can form a plurality of products at one time, the production efficiency can be doubled, and the cost of the corresponding forming process can be correspondingly reduced.

Drawings

FIG. 1 is a schematic view of a three-dimensional structure of a forming mold with a multi-layer mold cavity structure;

FIG. 2 is a schematic front view of a forming mold of a multilayer cavity structure during mold closing;

FIG. 3 is a schematic front view of a multi-layer cavity structure of a molding mold during mold opening

FIG. 4 is a schematic side view of a multi-layer cavity structure of a molding mold when the mold is opened;

FIG. 5 isbase:Sub>A schematic sectional view A-A;

FIG. 6 is an enlarged view of part I;

FIG. 7 is a schematic bottom view of the upper/middle module;

wherein: 1-upper module (comprising upper module mounting plate-11, upper module body-12, upper module boss-13), 2-middle module (comprising middle module body-21, middle module boss-22, middle module recess-23), 3-lower module (comprising lower module mounting spot 31, lower module body 32, lower module recess 33), 4-hydraulic cylinder, 5-hot runner, 6-tree seborrheic glue groove, 7-die-drawing opening, 8-clamping groove, 9-positioning guide pillar and 10-positioning hole.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "inner", "outer", "top surface", "bottom surface", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

With reference to fig. 1-7, a forming mold of a multilayer mold cavity structure comprises an upper mold block 1, a middle mold block 2, a lower mold block 3 and a hydraulic cylinder 4, wherein the upper mold block 1 comprises an upper mold block mounting plate 21, an upper mold block body 22 and an upper mold block boss 23; the middle module 2 comprises a middle module body 21, a middle module concave part 23 on the top surface of the middle module and a middle module boss 22 on the bottom surface of the middle module; the lower module 3 comprises a lower module mounting plate 31, a lower module body 32 and a lower module concave part 33; 4 hydraulic oil cylinders 4 are fixed on the lower module 3; the middle module 2 is connected with a hydraulic oil cylinder 4 and arranged between the upper module 1 and the lower module 3; the upper module boss 13 at the bottom of the upper module 1 and the middle module concave part 23 at the top surface of the middle module 2 form a die cavity; the middle module boss 22 at the bottom of the middle module 2 and the lower module concave part 33 at the top surface of the lower module 3 form another die cavity.

Go up module body 12, well module body 21, lower module body 32 and still be provided with hot runner 5, heat last module body 12, well module body 21, lower module body 32 through hot runner 5 for by the reduction of the mould pressing product difference in temperature in the thickness direction, temperature homogeneity improves. Is particularly suitable for flat plate type composite material parts of which the thickness of the die pressing products is in the range of 0.1mm-1 mm.

The upper module mounting plate 11 and the lower module mounting plate 31 are provided with clamping grooves 8, and the upper module 1 and the lower module 3 pass through the clamping grooves 8 through bolts to be fixed on a molding machine forming table.

The resin grooves 6 are arranged on the periphery of the middle module concave part 23 on the top surface of the middle module and the periphery of the lower module concave part 33 on the top surface of the lower module, so that gas and redundant resin can be smoothly discharged during mould pressing.

The upper module and the lower module are respectively provided with 4 positioning guide columns 9, and the middle module is provided with positioning holes 10 corresponding to the positioning guide columns. Through the cooperation of positioning guide pillar and locating hole, conveniently when the compound die, go up module, well module, lower module can accurate compound die.

Example 1

Utilize the utility model discloses a dull and stereotyped combined material of 0.2mm is moulded to the forming die of multilayer die cavity structure. The method comprises the following specific steps:

step one, heating an upper module, a middle module and a lower module of a mold to a process temperature, and controlling the actual temperature difference of the mold within 2 ℃;

step two, putting the prepreg into a mold cavity according to a layer laying scheme;

step three, returning the hydraulic oil cylinder to the initial position, and closing the middle module and the lower module;

step four, the upper module, the middle module and the lower module are assembled by a mould press;

step five, maintaining the pressure for a certain time;

and sixthly, opening the die, ejecting the hydraulic oil cylinder to a working position, separating the upper die block, the middle die block and the lower die block, and taking out products from the die cavity respectively.

Two pieces of product can be opened with the above mold. And after the product is taken out, the material spreading work of the second die can be carried out, and the production and preparation of the next die are continued.

Claims (6)

1. A forming die of a multilayer die cavity structure is characterized by comprising an upper die block, a middle die block, a lower die block and a hydraulic oil cylinder; the hydraulic oil cylinder is fixedly arranged on the lower module; the middle module is arranged between the upper module and the lower module through a connecting hydraulic oil cylinder and is pushed out and reset by the hydraulic oil cylinder to control the distance between the middle module and the lower module; a die cavity is arranged between the bottom surface of the upper die block and the top surface of the middle die block; another die cavity is arranged between the bottom surface of the middle die block and the top surface of the lower die block; and hot runners are arranged on the upper module, the middle module and the lower module.

2. The molding die of a multilayer cavity structure according to claim 1,

the upper module comprises an upper module body, an upper module mounting plate and an upper module boss;

the middle module comprises a middle module body, a middle module concave part and a middle module boss;

the lower module comprises a lower module mounting plate, a lower module body and a lower module concave part.

3. The forming die of claim 2, wherein the upper die block body, the middle die block body and the lower die block body are provided with hot runners.

4. The mold of claim 2, wherein the upper and lower mold fixing plates are provided with locking grooves.

5. The mold for molding a multi-layer cavity structure as claimed in claim 2, wherein the concave portions of the middle and lower mold blocks are further provided with resin grooves at their edges.

6. The molding die of a multilayer cavity structure according to claim 2, wherein:

the bottom of the upper module body and the top surface of the lower module body are provided with positioning guide pillars;

and the middle module body is provided with a positioning hole corresponding to the positioning guide pillar.

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